<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>file upload</title>
</head>
<body>
    <form action = "/success" method = "post" enctype="multipart/form-data">
        <input type="file" name="file">
        <input type = "submit" value="上传文件">
    </form>
</body>
</html>